U1155 – OBD-II DTC

OBD-II DTC U1155 – SCP (J1850) Invalid or Missing Data for Compact Disc

DTC U1155 meaning

DTC U1155 refers to a communication error within the vehicle’s network, specifically indicating “Invalid or Missing Data for Compact Disc.” This code is part of the On-Board Diagnostics II (OBD-II) system and is associated with the SCP (Serial Communication Protocol) using the J1850 standard. It suggests that the vehicle’s control modules are unable to receive or interpret data related to the compact disc player, which may affect audio functionality.

DTC U1155 symptoms

Common symptoms associated with DTC U1155 may include:

• Inoperable compact disc player
• Audio system malfunctions
• Intermittent or complete loss of sound
• Dashboard warning lights related to the audio system
• Other communication-related DTCs may be present

DTC U1155 causes

Several factors can lead to the triggering of DTC U1155, including:

• Faulty compact disc player
• Wiring issues, such as damaged or corroded connectors
• Malfunctioning control modules
• Software glitches or outdated firmware
• Electrical interference from other components

DTC U1155 seriousness

The seriousness of DTC U1155 can vary. While it may not pose an immediate safety risk, it can lead to a lack of functionality in the audio system, which can be a significant inconvenience for the driver and passengers. Additionally, unresolved communication issues may indicate underlying problems that could affect other vehicle systems.

How to diagnose DTC U1155

To diagnose DTC U1155, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1155.
2. Check for any additional DTCs that may provide more context.
3. Inspect the wiring and connectors related to the compact disc player for damage or corrosion.
4. Test the compact disc player for proper operation.
5. Examine the vehicle’s control modules for any signs of malfunction.
6. Update or reprogram the software if necessary.

How to fix DTC U1155 step-by-step instructions

To fix DTC U1155, follow these steps:

1. Inspect and repair any damaged wiring or connectors associated with the compact disc player.
2. Replace the compact disc player if it is found to be faulty.
3. Check and replace any malfunctioning control modules as needed.
4. Update the vehicle’s software or firmware to the latest version.
5. Clear the DTC using an OBD-II scanner and test the system to ensure the issue is resolved.

How to erase DTC U1155

To erase DTC U1155, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Access the DTC menu on the scanner and locate DTC U1155.
4. Select the option to erase or clear the DTC.
5. Turn off the ignition and disconnect the scanner.
6. Start the vehicle and monitor for the reappearance of the DTC.

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